What Is AAC? A Simple Explanation for Families

You've probably heard the term AAC from a therapist, teacher, or another parent. Maybe someone suggested your child might benefit from it. The name sounds clinical, but the idea behind it is straightforward. AAC is simply a way to help people communicate when speech alone isn't enough.

Let's break it down.

What Does AAC Stand For?

AAC stands for Augmentative and Alternative Communication.

• Augmentative means it adds to whatever speech your child already has
• Alternative means it can serve as a primary way to communicate when speech isn't reliable

In practice, AAC covers a wide range of tools and strategies. Some are as simple as pointing at pictures on a board. Others involve apps that speak words out loud when you tap a symbol. The common thread is that they all give a person more ways to express what they're thinking. If you encounter unfamiliar terms as you learn more, our AAC glossary defines the most common jargon in plain language.

The Three Types of AAC

Professionals often group AAC into three broad categories. Most people who use AAC actually use a mix of all three.

Unaided AAC

This includes any communication that uses only the body. No tools, no devices.

• Gestures (pointing, waving, nodding)
• Facial expressions
• Body language
• Sign language or manual signs

Every person on earth uses unaided AAC. When you nod your head to say yes or wave goodbye, that's unaided AAC. For some people, these strategies carry a larger share of their communication.

Low-Tech AAC

Low-tech AAC uses physical materials that don't require power or a screen.

• Picture cards or boards with symbols a person can point to
• Communication books organized by topic or category
• Letter boards for spelling out messages
• Choice boards with two or three options for specific situations

Low-tech AAC is portable, inexpensive, and doesn't break if you drop it. Many families start here because it's easy to set up and doesn't require learning new technology.

High-Tech AAC

High-tech AAC involves electronic devices or apps that produce speech output.

• Dedicated speech-generating devices (SGDs) designed specifically for communication
• Tablet apps like SabiKo that turn an iPad or Android tablet into a communication device
• Eye-tracking systems for people who can't use their hands reliably

High-tech AAC offers several advantages. It produces clear speech output so that anyone in the room can understand the message. It can store thousands of words and phrases. And it can grow with the user as their language develops. A major category within high-tech AAC is picture communication apps, which let users tap symbols on a screen to build spoken sentences.

Who Uses AAC?

AAC is for anyone whose speech doesn't fully meet their communication needs. That includes children and adults with:

• Autism spectrum disorder. Many autistic people benefit from visual communication systems, even those who have some spoken language.
• Apraxia of speech. The brain struggles to plan the motor movements needed for speech. AAC provides an alternative output.
• Cerebral palsy. Physical limitations can affect the muscles used for speech production.
• Down syndrome. AAC supports communication while spoken language develops on its own timeline.
• Traumatic brain injury or stroke. People who lose speech abilities later in life often use AAC during recovery or long-term.
• Progressive conditions like ALS. AAC becomes increasingly important as speech function changes over time.

The common factor is not a specific diagnosis. It's a gap between what a person wants to say and what they can express through speech alone.

Five Myths That Hold Families Back

Myth 1: "AAC is a last resort"

This is probably the most damaging misconception. Some families are told to exhaust every other option before trying AAC. But there is no evidence that waiting improves outcomes. Research by Romski and Sevcik (2005) found that early AAC intervention supports language development rather than replacing it. AAC should be introduced as soon as a communication gap is identified.

Myth 2: "AAC will prevent my child from talking"

Decades of research say otherwise. A systematic review by Millar, Light, and Schlosser (2006) examined 23 studies and found that no participants showed a decrease in speech after starting AAC. The vast majority maintained or increased their spoken language. AAC gives children a reason to communicate, and that motivation often carries over to speech. We break this down in detail in our post on whether AAC delays speech development.

Myth 3: "My child is too young"

There is no minimum age for AAC. Children as young as 12 months can start benefiting from symbol-based communication. Cress and Marvin (2003) specifically studied early communication intervention and found that introducing AAC strategies early leads to better outcomes than a wait-and-see approach. Our guide on AAC for toddlers covers this in depth.

Myth 4: "You need a diagnosis first"

You do not need a formal diagnosis to start using AAC. If your child is struggling to communicate, AAC can help right now. A speech-language pathologist can guide you, but you can also begin with simple strategies at home today.

Myth 5: "AAC is only for nonverbal children"

AAC is for anyone who needs communication support, including children who speak some words but can't yet express everything they need to. A child who says 20 words but has 200 things to communicate about is a great candidate for AAC.

What Does AAC Look Like in Daily Life?

Here's a realistic picture. A 3-year-old with autism uses a tablet app at breakfast. She taps "want" and then "banana" to tell her mom what she'd like to eat. At preschool, her teacher uses a picture board during circle time so she can answer questions with the group. At the park, she pulls her mom's hand and points. All of these are AAC.

It's not about being glued to a device. It's about having options. Different situations call for different tools, and the child gradually learns which one works best in each context.

How to Get Started

If you think your child could benefit from AAC, here are practical next steps:

1. Talk to a speech-language pathologist (SLP). Look for one with specific experience in AAC. They can assess your child's communication needs and recommend a starting point.
2. Try a free app. SabiKo is free and works offline, so you can explore AAC without any commitment or cost. For a broader overview of your options, see our roundup of free communication apps for nonverbal children.
3. Start modeling. Use the AAC system yourself during everyday routines. Point to symbols as you talk. This is how children learn that the symbols mean something.
4. Keep expectations realistic. AAC is a marathon, not a sprint. Most families see meaningful progress within a few months of consistent use.

The Only Thing That Matters

AAC is not about technology. It's not about diagnoses or labels. It's about making sure every person has a way to say what they need to say.

If your child is struggling to communicate, they don't need to qualify, wait, or prove readiness. They need tools. AAC provides those tools, and the sooner you start, the sooner your child can be heard.

Download SabiKo free and give your child a voice today.

References

• Romski, M.A., & Sevcik, R.A. (2005). Augmentative communication and early intervention: Myths and realities. Infants & Young Children, 18(3), 174-185.
• Millar, D.C., Light, J.C., & Schlosser, R.W. (2006). The impact of augmentative and alternative communication intervention on the speech production of individuals with developmental disabilities: A research review. Journal of Speech, Language, and Hearing Research, 49(2), 248-264.
• Cress, C.J., & Marvin, C.A. (2003). Common questions about AAC services in early intervention. Augmentative and Alternative Communication, 19(4), 254-272.